A Russian military spokesman is blaming the United States for a near-collision of the countries’ warplanes in Syrian airspace.

Major-General Igor Konashenkov said in a statement Saturday that the Oct. 17 incident involved a Sukhoi-35, Russia’s most advanced fighter jet, and an American E-3 radar plane near the city of Deir al-Zour. Konashenkov said Russia had informed the U.S. military of the Su-35’s intent to fly in the area.